A police trial of facial recognition equipment at Notting Hill Carnival led to around 35 false matches and one wrongful arrest, according to Sky News.

Although the technology did correctly match one face at the carnival, the person was already going through a justice system process and shouldn't have been on the suspects database.

It is thought that the system identified the individual as being wanted for rioting but they had actually already been arrested in between the database being compiled and the carnival taking place.

Sources also claim that five others were asked by police to prove their identity, as the system had identified them as suspects and if they hadn't been able to prove their identity they would have been wrongfully arrested too.